Swift

Fetch the UIDLs of All POP3 Messages

Demonstrates the Chilkat MailMan.FetchUidls method, which retrieves the UIDLs of the messages currently in the POP3 mailbox and stores them in a StringTable, one entry per message, in the server's current mailbox order. This example lists every UIDL.

Background: The UIDL list is the starting point for incremental mail retrieval. A client keeps a record of the UIDLs it has already downloaded; on each check it fetches the current list, computes the difference, and downloads only the new ones (see FetchUidlSet). This is how "leave a copy on the server" works without repeatedly re-downloading the same messages.

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func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the MailMan.FetchUidls method, which retrieves the UIDLs of the messages
    //  currently in the POP3 mailbox and stores them in a StringTable, one entry per message, in
    //  the server's current mailbox order.

    let mailman = CkoMailMan()!

    //  Configure the POP3 server connection.
    mailman.mailHost = "pop.example.com"
    mailman.mailPort = 995
    mailman.popSsl = true
    mailman.popUsername = "user@example.com"
    mailman.popPassword = "myPassword"

    //  Retrieve the UIDLs of all messages in the mailbox.
    let uidls = CkoStringTable()!

    success = mailman.fetchUidls(uidls: uidls)
    if success == false {
        print("\(mailman.lastErrorText!)")
        return
    }

    var n: Int = uidls.count.intValue
    print("Mailbox contains \(n) messages.")

    var i: Int
    for i = 0; i <= n - 1; i++ {
        print("UIDL \(i): \(uidls.string(at: i)!)")
    }

    //  Note: Explicitly connecting/authenticating is optional.  Chilkat MailMan automatically
    //  connects and authenticates -- using the property settings above -- whenever a server
    //  operation requires it.  Calling the explicit connect/authenticate methods can still be
    //  helpful to determine whether a failure occurs while connecting or while authenticating.

}